WAEC - Chemistry (1992 - No. 23)
What is the number of oxygen atoms in 32g of the gas? (O = 16, L = 6.0 X 10\(^{23}\) mol\(^{-1}\))
3.2 X 10 23
6.0 X 1023
1.2 X 1024
1.6 X 1024
2.0 X 1024
Förklaring
Oxygen is Diatomic
: 1 mole of oxygen contains 2 ATOMS
→ 2 X 16g = 32g
32g of the gas = 6.0 X 10\(^{23}\) mol\(^{-1}\)